Question:

On heating an aliphatic primary amine with chloroform and ethanolic potassium hydroxide, the organic compound formed is :

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This is the carbylamine (isocyanide) test for primary amines.
Updated On: Nov 11, 2026
  • an alkanol
  • an alkanediol
  • an alkyl cyanide
  • an alkyl isocyanide
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The Correct Option is D

Solution and Explanation

Aliphatic (and aromatic) primary amines on warming with \(\mathrm{CHCl_3}\) and ethanolic KOH give isocyanides (carbylamines), which have a foul smell: \(\mathrm{RNH_2 + CHCl_3 + 3KOH \to RNC + 3KCl + 3H_2O}\).
Answer: (4) an alkyl isocyanide
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